Improved fire-extinguisher



I Saillie.

UNITED STATES PATENT OFFICE.

JOHN F. BOYN'ION, OF SYRAGUSE, NEW YORK.

IMPROVED FIRE-EXTINGUISI-IER.

Specification forming part of Letters Patent No. 91,411, dated June 15,1869.

To all 'whom it may concern:

Be it known that I, JOHN F. BoYNToN, of the city of Syracuse, in thecounty of Onondaga, in the State of New York, have invented Aa new andImproved FireExtinguisher; and

I do hereby declare that the following is a full and exact descriptionthereof, reference being had to the accompanying drawings, and to theletters ot' reference marked thereon.

The nature of my invention consists in placing a cylinder filled withcompressed air or gases inside of a larger cylinder, which largercylinder may be filled with-.water or water containing chemicalsubstances in solution, the upper part ofthe superior cylinder soarranged that it may be closed air-tight and of sufficient strength tobear any desired pressure that may be produced by rupturing or givingvent to the compressed air or gas in the smaller cylinder.

The arrangement for puncturing or opening the inner cylinder may be ascrew-rod with a point and stu'ing-box, so constructed that by screwingdown the rod, a point upon its lower end may puncture the cylinder ofcondensed gases, allowing the same to escape among the liuids in thesuperior cylinder, which would thereby expel the fluids from thesuperior cylinder if a vent or stop-cock was opened forthe It canreadily be seen that if l the smaller cylinder; contained twentyatmospheres condensed into the volume of one, there would be a pressureof three hundred pounds to the square inch, and if this air weredischarged into the superior cylinder, containing a volumel of wateronly equal to one atmosphere, that the water would all be displaced bythe expanding air, and leave a surplus of power by its expansive forceafter the water was disengaged. In this way the superior cylindermay beconstructed for holding a quantity ot' water to be ejected,corresponding with the size of the smaller or air-cylinder, and thenumber of pounds of pressure to which it is charged.

The air-cylinders may be llled with an air or gas pump, and then closedby a stop-cock or hermetcally sealed by solder.

To put the machine in working operation, I [ill the superior cylindernearly full of water or water containing chemicals in solution, thenintroduce the air-cylinder, and if it does not cause the water to flowover the top of the superior cylinder, I lill it up until it does, andthen screw down the plug or cap which has passing through it thescrew-rod for puncturin g oropenin g the lesser cylinder.

Figure 1 is an upright sectional view of the entire machine.

A is the superior cylinder. B is the inferior cylinder. C is thescrew-rod for rupturing or opening the aircylinder. d is the rest orstump for the cylinder of compressed air.

This instrument may be used for throwing 1 Greek-tire upon an enernysvessels or fortifications when desired, and the air-cylinder placed uponthe outside if necessary.

What I claim as my invention, and desire to secure by Letters Patent,is-

1. The use of a cylinder ot compressed air or gases, placed withinanother cylinder, llled with iuids, and so arranged that by opening thecylinder of com pressed gases they will eject the liquids from thesuperior cylinder by their expanding force.

Z. The application of acylinder of condensed gases or air to the outsideof a larger cylinder, for expelling liquids from the same by theexpansive force ot' the-com pressed gases.

JOHN F. BOYNTON.

Witnesses:

EDM. F. BROWN, HENRY N. MYGATT.

